473,320 Members | 1,838 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,320 software developers and data experts.

question about URL + GET

Hey

asp.net 2.0 (C#)

Retriving value:
In my webpage, I need to retrieve a value from the URL, this is a parameter
stored in the url, like this: www.helloworld.com?testid=34
what C# code shall I use to retrive this testid value?

Setting value:
Another thing I'm wondering about is what C# code shall I use to set the
testid value to the URL, lets say I want to add the testid parameter to the
URL, what C# code shall I use to do that?

Jeff
Sep 5 '06 #1
3 1165
This is a QueryString variable so you will access it through the QueryString
collection

You'll need to test for a null value to start with before assigning it

if(Request.QueryString["testid"] != null)
something =
Convert.ToInt32(Request.QueryString["testid"].ToString());

The value of the testid is probably a number, so you'll need to convert
it from a string into something else. I tend to add the ToString() onto a
lot of collection operations simply to be sure. You never know when you'll
have a collection that will be a collection of objects instead of strings
and will throw an error. Also, this code doesn't test to ensure that it's a
valid integer varable before it tries the convert function.

Hope this helps,
Mark Fitzpatrick
Microsoft MVP - FrontPage
"Jeff" <it_consultant1@NO_SPAM.hotmail.comwrote in message
news:%2****************@TK2MSFTNGP05.phx.gbl...
Hey

asp.net 2.0 (C#)

Retriving value:
In my webpage, I need to retrieve a value from the URL, this is a
parameter stored in the url, like this: www.helloworld.com?testid=34
what C# code shall I use to retrive this testid value?

Setting value:
Another thing I'm wondering about is what C# code shall I use to set the
testid value to the URL, lets say I want to add the testid parameter to
the URL, what C# code shall I use to do that?

Jeff

Sep 5 '06 #2
thanks, just another thing I'm wondering about:
How can I set a value in the URL, lets say I want to set the testid in this
URL: www.helloworld.com?testid=34 to another value?

I tryed using Request.QueryString.Set, but get an error saying the
collection is readonly... maybe it can't be done?.. Maybe I instead should
use the session object. I'm trying to send value from 1 user control to a
group of other user control (how many isn't known before runtime)
"Mark Fitzpatrick" <ma******@fitzme.comwrote in message
news:%2****************@TK2MSFTNGP02.phx.gbl...
This is a QueryString variable so you will access it through the
QueryString collection

You'll need to test for a null value to start with before assigning it

if(Request.QueryString["testid"] != null)
something =
Convert.ToInt32(Request.QueryString["testid"].ToString());

The value of the testid is probably a number, so you'll need to convert
it from a string into something else. I tend to add the ToString() onto a
lot of collection operations simply to be sure. You never know when you'll
have a collection that will be a collection of objects instead of strings
and will throw an error. Also, this code doesn't test to ensure that it's
a valid integer varable before it tries the convert function.

Hope this helps,
Mark Fitzpatrick
Microsoft MVP - FrontPage
"Jeff" <it_consultant1@NO_SPAM.hotmail.comwrote in message
news:%2****************@TK2MSFTNGP05.phx.gbl...
>Hey

asp.net 2.0 (C#)

Retriving value:
In my webpage, I need to retrieve a value from the URL, this is a
parameter stored in the url, like this: www.helloworld.com?testid=34
what C# code shall I use to retrive this testid value?

Setting value:
Another thing I'm wondering about is what C# code shall I use to set the
testid value to the URL, lets say I want to add the testid parameter to
the URL, what C# code shall I use to do that?

Jeff


Sep 5 '06 #3
Unfortunately it's not possible to alter the querystring variables. You
can't change the variable since you would have to change the hyperlink
itself. The only thing you can do is to create a new link with the new id.

The session object does have a bit of a performance hit so that's something
to keep in mind.

Hope this helps,
Mark Fitzpatrick
Microsoft MVP - FrontPage

"Jeff" <it_consultant1@NO_SPAM.hotmail.comwrote in message
news:u6****************@TK2MSFTNGP06.phx.gbl...
thanks, just another thing I'm wondering about:
How can I set a value in the URL, lets say I want to set the testid in
this URL: www.helloworld.com?testid=34 to another value?

I tryed using Request.QueryString.Set, but get an error saying the
collection is readonly... maybe it can't be done?.. Maybe I instead should
use the session object. I'm trying to send value from 1 user control to a
group of other user control (how many isn't known before runtime)
"Mark Fitzpatrick" <ma******@fitzme.comwrote in message
news:%2****************@TK2MSFTNGP02.phx.gbl...
>This is a QueryString variable so you will access it through the
QueryString collection

You'll need to test for a null value to start with before assigning it

if(Request.QueryString["testid"] != null)
something =
Convert.ToInt32(Request.QueryString["testid"].ToString());

The value of the testid is probably a number, so you'll need to
convert it from a string into something else. I tend to add the
ToString() onto a lot of collection operations simply to be sure. You
never know when you'll have a collection that will be a collection of
objects instead of strings and will throw an error. Also, this code
doesn't test to ensure that it's a valid integer varable before it tries
the convert function.

Hope this helps,
Mark Fitzpatrick
Microsoft MVP - FrontPage
"Jeff" <it_consultant1@NO_SPAM.hotmail.comwrote in message
news:%2****************@TK2MSFTNGP05.phx.gbl...
>>Hey

asp.net 2.0 (C#)

Retriving value:
In my webpage, I need to retrieve a value from the URL, this is a
parameter stored in the url, like this: www.helloworld.com?testid=34
what C# code shall I use to retrive this testid value?

Setting value:
Another thing I'm wondering about is what C# code shall I use to set the
testid value to the URL, lets say I want to add the testid parameter to
the URL, what C# code shall I use to do that?

Jeff



Sep 5 '06 #4

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

1
by: Mohammed Mazid | last post by:
Can anyone please help me on how to move to the next and previous question? Here is a snippet of my code: Private Sub cmdNext_Click() End Sub Private Sub cmdPrevious_Click() showrecord
3
by: Stevey | last post by:
I have the following XML file... <?xml version="1.0"?> <animals> <animal> <name>Tiger</name> <questions> <question index="0">true</question> <question index="1">true</question> </questions>
7
by: nospam | last post by:
Ok, 3rd or is it the 4th time I have asked this question on Partial Types, so, since it seems to me that Partial Types is still in the design or development stages at Microsoft, I am going to ask...
3
by: Ekqvist Marko | last post by:
Hi, I have one Access database table including questions and answers. Now I need to give answer id automatically to questionID column. But I don't know how it is best (fastest) to do? table...
10
by: glenn | last post by:
I am use to programming in php and the way session and post vars are past from fields on one page through to the post page automatically where I can get to their values easily to write to a...
10
by: Rider | last post by:
Hi, simple(?) question about asp.net configuration.. I've installed ASP.NET 2.0 QuickStart Sample successfully. But, When I'm first start application the follow message shown. ========= Server...
53
by: Jeff | last post by:
In the function below, can size ever be 0 (zero)? char *clc_strdup(const char * CLC_RESTRICT s) { size_t size; char *p; clc_assert_not_null(clc_strdup, s); size = strlen(s) + 1;
56
by: spibou | last post by:
In the statement "a *= expression" is expression assumed to be parenthesized ? For example if I write "a *= b+c" is this the same as "a = a * (b+c)" or "a = a * b+c" ?
2
by: Allan Ebdrup | last post by:
Hi, I'm trying to render a Matrix question in my ASP.Net 2.0 page, A matrix question is a question where you have several options that can all be rated according to several possible ratings (from...
3
by: Zhang Weiwu | last post by:
Hello! I wrote this: ..required-question p:after { content: "*"; } Corresponding HTML: <div class="required-question"><p>Question Text</p><input /></div> <div...
0
by: DolphinDB | last post by:
The formulas of 101 quantitative trading alphas used by WorldQuant were presented in the paper 101 Formulaic Alphas. However, some formulas are complex, leading to challenges in calculation. Take...
0
by: DolphinDB | last post by:
Tired of spending countless mintues downsampling your data? Look no further! In this article, you’ll learn how to efficiently downsample 6.48 billion high-frequency records to 61 million...
0
isladogs
by: isladogs | last post by:
The next Access Europe meeting will be on Wednesday 6 Mar 2024 starting at 18:00 UK time (6PM UTC) and finishing at about 19:15 (7.15PM). In this month's session, we are pleased to welcome back...
0
by: Vimpel783 | last post by:
Hello! Guys, I found this code on the Internet, but I need to modify it a little. It works well, the problem is this: Data is sent from only one cell, in this case B5, but it is necessary that data...
0
by: ArrayDB | last post by:
The error message I've encountered is; ERROR:root:Error generating model response: exception: access violation writing 0x0000000000005140, which seems to be indicative of an access violation...
1
by: PapaRatzi | last post by:
Hello, I am teaching myself MS Access forms design and Visual Basic. I've created a table to capture a list of Top 30 singles and forms to capture new entries. The final step is a form (unbound)...
0
by: CloudSolutions | last post by:
Introduction: For many beginners and individual users, requiring a credit card and email registration may pose a barrier when starting to use cloud servers. However, some cloud server providers now...
0
by: Defcon1945 | last post by:
I'm trying to learn Python using Pycharm but import shutil doesn't work
0
by: af34tf | last post by:
Hi Guys, I have a domain whose name is BytesLimited.com, and I want to sell it. Does anyone know about platforms that allow me to list my domain in auction for free. Thank you

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.